Role and regulation of cyclin F in the cellular responses to ionizing radiation (IR).

Every dividing cell must copy its DNA without errors, and a protein called cyclin F helps control the enzymes that supply the building blocks for that process. This matters because cancer cells often disable the checkpoints that normally catch DNA copying mistakes, giving them a growth advantage. Radiation therapy exploits this weakness by damaging cancer cell DNA, but tumours can become resistant. The D’Angiolella lab has shown that cyclin F coordinates the production and removal of the enzymes that make DNA building blocks, and that this balance is essential for accurate replication and cell survival. What remains unknown is exactly how cyclin F and related genes modulate cancer cells’ responses to radiation. If this research succeeds, it could identify new vulnerabilities in cancer cells that make radiation therapy more effective. That might mean lower radiation doses, fewer side effects, or better outcomes for patients whose tumours currently resist treatment. This is fundamental science—the lab is not testing a drug or a clinical protocol. But understanding how cells manage their DNA building blocks during division has already revealed a mechanism that could be exploited therapeutically, and deeper knowledge of cyclin F’s role may point to specific targets for future drug development.